>> if I use this formula I get amplitude values which don't make sense, if
>> i put a 43 hz sine into a 1024 samples framed fft opcode
>
>Hmm, one thing comes to mind -- 43 Hz is a low frequency, you may not
>be getting many cycles in your 1024 frame, which will make amplitude
>estimation noisy. Try the experiment first with 1Khz and see if the
>numbers make sense ... although I'm really not a spectral estimation
>guy, so this could be an incorrect analysis ...
Why not generate a sine tone and adjust it's amplitude with the data, and
let your ears decide weither it's right or not. You'll hear it immediately.
Niels
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